Title (en)

Apparatus and method for mode transition of a transmit diversity scheme in a mobile communication system

Title (de)

Vorrichtung und Verfahren für den Übergangsmodus von einem Sendediversitätschema in einem Mobilfunkssystem

Title (fr)

Appareil et procédé pour la transition de mode d'un mecanisme à diversité d'émission dans un système de communications mobiles

Publication

EP 1478105 A1 20041117 (EN)

Application

EP 04011674 A 20040517

Priority

KR 20030031334 A 20030516

Abstract (en)

An apparatus and method for Transmit Diversity mode transition in a mobile communication system for use with transmit diversity is disclosed. In a mobile communication system including a Node B comprising one or more antennas and a Mobile Station (MS) for transmitting Transmit Diversity information to the Node B to enable the plurality of antennas to implement the maximum Transmit Diversity. The apparatus and method for assigning weights to transmission data of the antennas to enable the Node B to implement the maximum Transmit Diversity when the mode transition occurs in the Transmit Diversity modes comprise determining whether the mode transition occurs using the Transmit Diversity information; and assigning a weight generated considering the relationship between a current weight and a previous weight used before the mode transition time to the data transmitted over the antennas if it is determined that the mode transition occurs. <IMAGE>

IPC 1-7

H04B 7/06

IPC 8 full level

H04B 7/06 (2006.01); H04B 7/26 (2006.01)

CPC (source: EP KR US)

H04B 7/06 (2013.01 - KR); H04B 7/0634 (2013.01 - EP US); H04B 7/0689 (2013.01 - EP US); H04B 7/0604 (2013.01 - EP US); H04B 7/0669 (2013.01 - EP US)

Citation (search report)

• [A] WO 02093783 A1 20021121 - SIEMENS AG [DE], et al
• [A] 3RD GENERATION PARTNERSHIP PROJECT: "3GPP TS 25.214 V5.0.0: Physical Layer Procedures (FDD)", 3GPP TS 25.214 V5.0.0, XX, XX, March 2002 (2002-03-01), pages 1 - 56, XP002214164
• [A] HOTTINEN A ET AL: "Transmit diversity using filtered feedback weights in the FDD/WCDMA system", BROADBAND COMMUNICATIONS, 2000. PROCEEDINGS. 2000 INTERNATIONAL ZURICH SEMINAR ON ZURICH, SWITZERLAND 15-17 FEB. 2000, PISCATAWAY, NJ, USA,IEEE, US, 15 February 2000 (2000-02-15), pages 15 - 21, XP010376432, ISBN: 0-7803-5977-1
• [A] HAMALAINEN J ET AL: "Feedback schemes for FDD WCDMA systems in multipath environments", VTC 2001 SPRING. IEEE VTS 53RD. VEHICULAR TECHNOLOGY CONFERENCE. RHODES, GREECE, MAY 6 - 9, 2001, IEEE VEHICULAR TECHNOLGY CONFERENCE, NEW YORK, NY : IEEE, US, vol. VOL. 1 OF 4. CONF. 53, 6 May 2001 (2001-05-06), pages 238 - 242, XP002193119, ISBN: 0-7803-6728-6

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 1478105 A1 20041117; EP 1478105 B1 20060426; CN 1330108 C 20070801; CN 1574686 A 20050202; DE 602004000728 D1 20060601; DE 602004000728 T2 20070426; JP 2004343773 A 20041202; JP 4027912 B2 20071226; KR 100575930 B1 20060502; KR 20040098976 A 20041126; US 2005084029 A1 20050421; US 7391831 B2 20080624

DOCDB simple family (application)

EP 04011674 A 20040517; CN 200410068442 A 20040517; DE 602004000728 T 20040517; JP 2004145607 A 20040514; KR 20030031334 A 20030516; US 84693304 A 20040517